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Java StringBufferInputStream available() Method with Example

StringBufferInputStream Class available() method: Here, we are going to learn about the available() method of StringBufferInputStream Class with its syntax and example.
Submitted by Preeti Jain, on April 26, 2020

StringBufferInputStream Class available() method

• available() method is available in java.io package.
• available() method is used to get the number of available bytes left that can be read without blocking from this StringBufferInputStream.
• available() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.
• available() method does not throw an exception at the time of returning available bytes.

Syntax:

    public int available();

Parameter(s):

• It does not accept any parameter.

Return value:

The return type of the method is int, it returns the exact number of bytes read.

Example:

// Java program to demonstrate the example 
// of int available() method of StringBufferInputStream

import java.io.*;

public class AvailableOfSBIS {
    public static void main(String[] args) throws Exception {
        StringBufferInputStream is_stm = null;
        int count = 0;

        try {
            // Instantiates StringBufferInputStream
            is_stm = new StringBufferInputStream("Java Programming");
            
            // Loop to read until available
            // bytes left
            while ((count = is_stm.read()) != -1) {
                // By using available() method is to
                // return the available bytes to be read
                int avail_bytes = is_stm.available();

                // Display corresponding char value
                char ch = (char) count;

                // Display value of avail_bytes and ch
                System.out.print("is_stm.available(): " + avail_bytes);
                System.out.println(" : " + "ch: " + ch);
            }
        } catch (Exception ex) {
            System.out.println(ex.toString());
        } finally {
            // with the help of this block is to
            // free all necessary resources linked
            // with the stream

            if (is_stm != null) {
                is_stm.close();
            }
        }
    }
}

Output

is_stm.available(): 15 : ch: J
is_stm.available(): 14 : ch: a
is_stm.available(): 13 : ch: v
is_stm.available(): 12 : ch: a
is_stm.available(): 11 : ch:  
is_stm.available(): 10 : ch: P
is_stm.available(): 9 : ch: r
is_stm.available(): 8 : ch: o
is_stm.available(): 7 : ch: g
is_stm.available(): 6 : ch: r
is_stm.available(): 5 : ch: a
is_stm.available(): 4 : ch: m
is_stm.available(): 3 : ch: m
is_stm.available(): 2 : ch: i
is_stm.available(): 1 : ch: n
is_stm.available(): 0 : ch: g